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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lanthanide trifluoromethanesulfonates ： ウィキペディア英語版 Lanthanide trifluoromethanesulfonates Lanthanide triflates are triflate salts of the lanthanide family with many uses in organic chemistry as Lewis acid catalysts. The catalysts act similarly to aluminium chloride or ferric chloride, but are stable in water, which makes it possible to use water as a solvent instead of organic solvents. ==Molecular structure== Lanthanide triflates consist of a lanthanide metal ion and three triflate ions. The lanthanides, or rare earth metals, are the elements from lanthanum to lutetium in the periodic table. Triflate is a contraction of trifluoromethanesulfonate; its molecular formula is CF3SO3, and is commonly designated ‘OTf’. Triflic acid is a ‘superacid’ so its conjugate base ions are very stable. Lanthanide triflates are normally nonahydrates, mostly commonly depicted as Ln(OTf)3·(H2O)9; however, in the solid state and in aqueous solution, the waters are bound to the lanthanide and the triflates are counteranions, so more accurately lanthanide triflate nonahydrate is written as ()(OTf)3. Anhydrous lanthanide triflates, Ln(OTf)3, are also easily obtained as described below. The metal triflate complex is strongly electrophilic, thus acts as a strong Lewis acid. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lanthanide trifluoromethanesulfonates」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.